﻿//=================================================================================================
// Copyright 2013-2017 Dirk Lemstra <https://github.com/dlemstra/Magick.NET/>
//
// Licensed under the ImageMagick License (the "License"); you may not use this file except in
// compliance with the License. You may obtain a copy of the License at
//
//   http://www.imagemagick.org/script/license.php
//
// Unless required by applicable law or agreed to in writing, software distributed under the
// License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
// express or implied. See the License for the specific language governing permissions and
// limitations under the License.
//=================================================================================================

using System;

namespace ImageMagick
{
    internal abstract class ConstNativeInstance : NativeHelper
    {
        private IntPtr _Instance = IntPtr.Zero;

        protected abstract string TypeName
        {
            get;
        }

        public IntPtr Instance
        {
            get
            {
                if (_Instance == IntPtr.Zero)
                    throw new ObjectDisposedException(TypeName);

                return _Instance;
            }
            set
            {
                _Instance = value;
            }
        }
    }
}